package com.baizhi.config;

import com.baizhi.shiro.cache.RedisCacheManager;
import com.baizhi.shiro.realms.CustomerRealm;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author benben278
 * @create 2022-04-15 13:48
 */
//用来整合shiro相关的配置类
@Configuration
public class ShiroConfig {
    //1、创建shiroFilter 负责拦截所有请求
    @Bean
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(DefaultWebSecurityManager defaultWebSecurityManager){
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        //给filter设置安全管理器
        shiroFilterFactoryBean.setSecurityManager(defaultWebSecurityManager);
        //配置系统的受限资源
        //配置系统的公共资源
        Map<String,String> map=new HashMap<>();
        map.put("/user/login","anon");//anon设置为公共资源，注意代码顺序，公共资源要放在受限资源上面。
        map.put("/user/register","anon");
        map.put("/register.jsp","anon");
        map.put("/user/getImage","anon");
        map.put("/**","authc");//authc请求这个资源需要认证和授权

        //默认认证界面路径/login.jsp
        shiroFilterFactoryBean.setLoginUrl("/login.jsp");

        shiroFilterFactoryBean.setFilterChainDefinitionMap(map);

        return shiroFilterFactoryBean;
    }
    //2、创建安全管理器
    @Bean
    public DefaultWebSecurityManager getDefaultWebSecurityManager(Realm realm){
        DefaultWebSecurityManager defaultWebSecurityManager = new DefaultWebSecurityManager();
        //给安全管理器设置realm
        defaultWebSecurityManager.setRealm(realm);
        return defaultWebSecurityManager;
    }
    //3、创建自定义realm
    @Bean
    public Realm getRealm(){
        CustomerRealm customerRealm = new CustomerRealm();
        //修改凭证校验匹配器
        HashedCredentialsMatcher credentialsMatcher = new HashedCredentialsMatcher();
        //设置加密算法为MD5
        credentialsMatcher.setHashAlgorithmName("MD5");
        //设置散列次数
        credentialsMatcher.setHashIterations(1024);
        customerRealm.setCredentialsMatcher(credentialsMatcher);

        //开启缓存管理
        customerRealm.setCacheManager(new RedisCacheManager());
        customerRealm.setCachingEnabled(true);//开启全局缓存
        customerRealm.setAuthenticationCachingEnabled(true);//开启认证缓存
        customerRealm.setAuthenticationCacheName("authenticationCache");//设置认证缓存名称
        customerRealm.setAuthorizationCachingEnabled(true);//开启授权缓存
        customerRealm.setAuthorizationCacheName("authorizationCache");//设置授权缓存名称

        return customerRealm;
    }
}
